The Scottish Fire and Rescue Service were called to the blaze on Bridge Street at around 2.40am on July 28.
The church is Glasgow’s third oldest Catholic Church and pictures of the fire shared across social media show the severity of the incident, with one video showing the roof collapsing into the flames.
Here are some of the pictures which show exactly what has happened to the historic church.
9. Dozens of firefighters were on the scene
Another shot showing the extent of the damage to the front of St Simon's Church as firefighters gathered around the scene after extinguishing most of the flames. Photo: JPIMedia
10. The scene on Wednesday morning
The cause of the fire is still unknown with police saying that enquires are ongoing, but the emergency services worked well into Wednesday morning to make the area safe and put out the blaze that took hold of the historic church. Photo: JPIMedia